Preparation for regenerating metals.



. No Drawing.

UNITED STATES PATENT OFFICE.

BRUNO TtTRKE, OF MUNICH, GERMANY.

- PREPARATION FOR REGENERATING METALS.

I '0 (ill whom it may concern:

heating or burning can no longer be properly )rked, owing to their having lost their carbon, etc.

' The new regenerating agent consists of a mixture of the following ingredients, combined in substantially the proportions stated, viz.: 5 parts of a-resin alliedto the terpenes, 2 parts of bone dustCa (PO 1 part of blue vitriol-CuSO +5H O, 1 partof bora'xNa B,O {-]0H O, 1 part of rock salt- NaCl.

As is well known, so -called hardeningagents have been employed to impart a superficial hardnessto certain metals, as it is not possible to harden themnormally. My invention differs essentially from such method, as by means of my new preparation the carbon which has been lost through overheating and the like, can be readily restored to the interior of the metal, sot-hat the latter can be subsequently hardenedagain in the Customary manner.

In carrying out my invention, a pulverulent preparation is made from the already Specification of Letters Patent.

Patented June 11, 1912.

Application filed February 9, 1911. Serial No. 607,554.

mentioned substances. This preparation is distributed over the deteriorated 1netalfor instance, iron or steel-in red-hotstate. The

vapors which are given off during combustion of the preparation penetrate the open pores of the metal, so that the latter becomes again thoroughly impregnated with the lost carbon. In this manner the metal regains its original quality and is rendered fit for being worked up again.

Having thus described my invention, I declare that what I claim as n.ew,a nd desire to secure by Letters Patent of the. United States, is I 1. The composition of matter, consisting of resin, bone dust, blue vitriol, borax, and rock salt, the amount of b'one dust being double that of each of the other ingredients, except the resin, the quantity of which lat-- teris equal to the sum of the. quantities of all the other ingredients together, substantially as herein'described.

2. The herein-described agent for re'gen crating metals, consisting of a pulverulent preparation of five parts of a resin allied to the terpenes,'two parts of bone dust, one part of blue vitriol, one part of borax, one part of rock salt, substantially as specified.

In testimony whereof I atfix my signature in presence of two Witnesses.

BRUNO TURKE.

\Vitnesses:

ARTHUR V. V. COTTER, MATHILDE K. HELD. 

